Change Array by copy proposal:
- Moved to Stage 3, March TC39 meeting
- Disabled forced replacement and added /actual/ entry points for methods from this proposal
- Array.prototype.toSpliced throws a TypeError instead of RangeError if the result length is more than MAX_SAFE_INTEGER, proposal-change-array-by-copy/70
Added some more atob / btoa fixes:
- NodeJS <17.9 atob does not ignore spaces, node/42530
- Actual NodeJS atob does not validate encoding, node/42646
- FF26- implementation does not properly convert argument to string
- IE / Edge <16 implementation have wrong arity
Added /full/ namespace as the replacement for /features/ since it's more descriptive in context of the rest namespaces (/es/ ⊆ /stable/ ⊆ /actual/ ⊆ /full/)
Avoided propagation of removed parts of proposals to upper stages. For example, %TypedArray%.prototype.groupBy was removed from the Array grouping proposal a long time ago. We can't completely remove this method since it's a breaking change. But this proposal has been promoted to stage 3 - so the proposal should be promoted without this method, this method should not be available in /actual/ entries - but it should be available in early-stage entries to avoid breakage.
Significant internal refactoring and splitting of modules (but without exposing to public API since it will be a breaking change - it will be exposed in the next major version)
Bug fixes:
- Fixed work of non-standard V8 Error features with wrapped Error constructors, #1061
- null and undefined allowed as the second argument of structuredClone, #1056
Tooling:
- Stabilized proposals are filtered out from the core-js-compat -> core-js-builder -> core-js-bundle output. That mean that if the output contains, for example, es.object.has-own, the legacy reference to it, esnext.object.has-own, no longer added.
- Aligned modules filters of core-js-builder and core-js-compat, now it's modules and exclude options
- Added support of entry points, modules, regexes, and arrays of them to those filters
- Missed targets option of core-js-compat means that the targets filter just will not be applied, so the result will contain modules required for all possible engines
Compat data:
- .stack property on DOMException marked as supported from Deno 1.15
- Added Deno 1.21 compat data mapping
- Added Electron 19.0 and updated 18.0 compat data mapping
- Added Samsung Internet 17.0 compat data mapping
- Added Opera Android 68 compat data mapping

3.21.1

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zloirock

published 3.21.1 • 3 years ago

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3.21.1 - 2022.02.17

Added a bugfix for the WebKit Array.prototype.{ groupBy, groupByToMap } implementation
core-js-compat targets parser transforms engine names to lower case
atob / btoa marked as fixed in NodeJS 17.5
Added Electron 18.0 compat data mapping
Added Deno 1.20 compat data mapping

3.21.0

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zloirock

published 3.21.0 • 3 years ago

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3.21.0 - 2022.02.02

Added Base64 utility methods:
- atob
- btoa
Added the proper validation of arguments to some methods from web standards
Forced replacement of all features from early-stage proposals for avoiding possible web compatibility issues in the future
Added Rhino 1.7.14 compat data
Added Deno 1.19 compat data mapping
Added Opera Android 66 and 67 compat data mapping
Added iOS Safari 15.3 and 15.4 compat data mapping

3.20.3

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zloirock

published 3.20.3 • 3 years ago

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3.20.3 - 2022.01.15

Detects and replaces broken third-party Function#bind polyfills, uses only native Function#bind in the internals
structuredClone should throw an error if no arguments passed
Changed the structure of notes in __core-js_shared__

3.20.2

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zloirock

published 3.20.2 • 3 years ago

Changelog

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3.20.2 - 2022.01.02

Added a fix of a V8 ~ Chrome 36- Object.{ defineProperty, defineProperties } bug, Babel issue
Added fixes of some different %TypedArray%.prototype.set bugs, affects modern engines (like Chrome < 95 or Safari < 14.1)

3.20.1

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zloirock

published 3.20.1 • 3 years ago

Changelog

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3.20.1 - 2021.12.23

Fixed the order of calling reactions of already fulfilled / rejected promises in Promise.prototype.then, #1026
Fixed possible memory leak in specific promise chains
Fixed some missed dependencies of entries
Added Deno 1.18 compat data mapping

3.20.0

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zloirock

published 3.20.0 • 3 years ago

Changelog

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3.20.0 - 2021.12.16

Added structuredClone method from the HTML spec, see MDN
- Includes all cases of cloning and transferring of required ECMAScript and platform types that can be polyfilled, for the details see the caveats
- Uses native structured cloning algorithm implementations where it's possible
- Includes the new semantic of errors cloning from html/5749
Added DOMException polyfill, the Web IDL spec, see MDN
- Includes DOMException and its attributes polyfills with fixes of many different engines bugs
- Includes DOMException#stack property polyfill in engines that should have it
- Reuses native DOMException implementations where it's possible (for example, in old NodeJS where it's not exposed as global)
Added support of cause on all Error types
Added Error.prototype.toString method polyfill with fixes of many different bugs of JS engines
Added Number.prototype.toExponential method polyfill with fixes of many different bugs of JS engines
Array grouping proposal:
- Moved to stage 3
- Added Array.prototype.groupByToMap method
- Removed @@species support
Added change Array by copy stage 2 proposal:
- Array.prototype.toReversed
- Array.prototype.toSorted
- Array.prototype.toSpliced
- Array.prototype.with
- %TypedArray%.prototype.toReversed
- %TypedArray%.prototype.toSorted
- %TypedArray%.prototype.toSpliced
- %TypedArray%.prototype.with
Added Iterator.prototype.toAsync method from the iterator helpers stage 2 proposal
Array.fromAsync proposal moved to stage 2
Added String.cooked stage 1 proposal
Added Function.prototype.unThis stage 0 proposal
Added Function.{ isCallable, isConstructor } stage 0 proposal:
- Function.isCallable
- Function.isConstructor
Added a workaround of most cases breakage modern String#at after loading obsolete String#at proposal module, #1019
Fixed Array.prototype.{ values, @@iterator }.name in V8 ~ Chrome 45-
Fixed validation of typed arrays in typed arrays iteration methods in V8 ~ Chrome 50-
Extension of the API, #1012
- Added a new core-js/actual/** namespace
- Added entry points for each finished post-ES6 proposal

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